i2c: Make i2c_check_addr static

i2c_check_addr is only used inside i2c-core now, so we can make it
static and stop exporting it. Thanks to David Brownell for noticing.

Signed-off-by: Jean Delvare <khali@linux-fr.org>

drivers/i2c/i2c-core.c

@@ -673,7 +673,7 @@ static int __i2c_check_addr(struct i2c_adapter *adapter, unsigned int addr)
 	return 0;
 }
 
-int i2c_check_addr(struct i2c_adapter *adapter, int addr)
+static int i2c_check_addr(struct i2c_adapter *adapter, int addr)
 {
 	int rval;
 
@@ -683,7 +683,6 @@ int i2c_check_addr(struct i2c_adapter *adapter, int addr)
 
 	return rval;
 }
-EXPORT_SYMBOL(i2c_check_addr);
 
 int i2c_attach_client(struct i2c_client *client)
 {

include/linux/i2c.h

@@ -400,11 +400,6 @@ extern int i2c_release_client(struct i2c_client *);
 extern void i2c_clients_command(struct i2c_adapter *adap,
 				unsigned int cmd, void *arg);
 
-/* returns -EBUSY if address has been taken, 0 if not. Note that the only
-   other place at which this is called is within i2c_attach_client; so
-   you can cheat by simply not registering. Not recommended, of course! */
-extern int i2c_check_addr (struct i2c_adapter *adapter, int addr);
-
 /* Detect function. It iterates over all possible addresses itself.
  * It will only call found_proc if some client is connected at the
  * specific address (unless a 'force' matched);